document updated 18 years ago, on Apr 5, 2006
Related Devices
General Play-Related Info
Current Limits
(nobody agrees about this stuff, and amateurs like to weigh in a lot)
General Implementation Possibilities
(these are standard high-voltage generation techniques... the reason is that you want to use a 9 volt battery to be 100% sure it's a low-current supply, but you probably want the output to be >9v)